Well they appeared in the Precambrian Era, as bacteria. The Paleozoic, as trilobites, brachiopods and fish.
Most brachiopods became extinct about 250 million years ago during the P-T Extinction period. Modern day brachiopods do still exist in the form of lingula.
Trilobites and brachiopods first appeared during the Cambrian period, around 541 million years ago. They were both abundant and diverse in the ancient oceans, contributing to the biodiversity of marine life during that time.
Brachiopods are related to Brachiopods, they exist in the modern day just not as abundantly as in the past.
Brachiopods are also known as lamp shells. They are marine animals that have a lifespan that ranges from 3 to 30+ years.
Brachiopods were marine organisms that thrived primarily during the Paleozoic Era, particularly in the Cambrian and Devonian periods. During this time, trilobites were also abundant in the oceans and likely coexisted with brachiopods. Additionally, early fish, such as jawless fish, were present during this period, further indicating a diverse marine ecosystem alongside brachiopods.
Brachiopods,Bivalves,Echinoderms,Bryozoans,and some corals went extinct and yes these are real words.
Paleozoic
The Devonian Period, which is about 417 to 354 million years ago, is in the Paleozoic Era. The most common shell fossils from the Devonian Period are those of Brachiopods, whose shells are symmetrical but unequal in size. Today they are mostly extinct.
Brachiopods are a type of marine invertebrate that develop through a process similar to other marine organisms. They begin as larvae that settle on the ocean floor, secreting a calcareous shell for protection as they grow. Over time, they continue to grow and develop within their shells until reaching maturity.
brachiopods
In the Triassic period